EP 1535395 B1 20071003 - METHOD AND DEVICE FOR INJECTION LOCKING OF VOLTAGE CONTROLLED OSCILLATORS USING DIRECT DIGITAL TUNING
Title (en)
METHOD AND DEVICE FOR INJECTION LOCKING OF VOLTAGE CONTROLLED OSCILLATORS USING DIRECT DIGITAL TUNING
Title (de)
VERFAHREN UND EINRICHTUNG ZUR EINSPEISUNG DER VERRIEGELUNG VON SPANNUNGSGESTEUERTEN OSZILLATOREN MIT DIREKTER DIGITALER ABSTIMMUNG
Title (fr)
PROCEDE ET DISPOSITIF DE VERROUILLAGE PAR INJECTION D'OSCILLATEURS A TENSION VARIABLE A L'AIDE DE LA SYNTONISATION NUMERIQUE DIRECTE
Publication
Application
Priority
- CA 0301204 W 20030811
- CA 2395891 A 20020812
Abstract (en)
[origin: US6963249B2] The invention relates to the field of electronics and more particularly to the tuning and injection locking of voltage controlled oscillators (VCOs). An improved injection locking circuit is provided which allows the VCO to injection lock with a smaller reference signal and therefore a smaller locking bandwidth (LBW). In order to allow the VCO to injection lock with a lower power reference signal, this invention includes a pre-tuning algorithm to place the VCO frequency such that the desired frequency is in the LBW. Tuning of the VCO is achieved using direct digital tuning that does not require an input reference. Injection locking is performed using a low frequency clock harmonic as the reference signal. More specifically, tuning is accomplished by sub-sampling and digitizing the output signal of the VCO, determining the center frequency, and adjusting the VCO control voltage.
IPC 8 full level
H03L 7/099 (2006.01); H03B 5/12 (2006.01); H03L 7/20 (2006.01); H03L 7/24 (2006.01)
CPC (source: EP KR US)
H03B 5/12 (2013.01 - KR); H03B 5/1215 (2013.01 - EP US); H03B 5/1228 (2013.01 - EP US); H03B 5/1243 (2013.01 - EP US); H03L 7/099 (2013.01 - KR); H03L 7/20 (2013.01 - KR); H03L 7/24 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated extension state (EPC)
AL LT LV MK
DOCDB simple family (publication)
CA 2395891 A1 20040212; AT E375030 T1 20071015; AU 2003258398 A1 20040225; CN 100530973 C 20090819; CN 1675841 A 20050928; DE 60316695 D1 20071115; DE 60316695 T2 20080605; EP 1535395 A1 20050601; EP 1535395 B1 20071003; ES 2295673 T3 20080416; JP 2005536095 A 20051124; JP 4384036 B2 20091216; KR 101018585 B1 20110304; KR 20050071470 A 20050707; US 2004036538 A1 20040226; US 6963249 B2 20051108; WO 2004015870 A1 20040219
DOCDB simple family (application)
CA 2395891 A 20020812; AT 03783879 T 20030811; AU 2003258398 A 20030811; CA 0301204 W 20030811; CN 03818996 A 20030811; DE 60316695 T 20030811; EP 03783879 A 20030811; ES 03783879 T 20030811; JP 2004526550 A 20030811; KR 20057002218 A 20030811; US 63954303 A 20030812